dselect CD-ROM / hard disk / NFS method

[Ian Jackson <ian@chiark.chu.cam.ac.uk>]

I'm going to program the names `stable' and `development' for the two
release trees and `contrib' and `non-free' for the secondary package
trees into the dselect disk-based installation scripts unless someone
tells me otherwise.

If it sees what looks like a Debian mirror of some kind (possibly in a
`debian' subdirectory) and has `stable' and `development'
subdirectories it will offer the user the choice between the stable
tree and the development one, rather than requiring them to specify
the pathname themselves.  (The user will still be able to specify a
different pathname if they want to.)

If `contrib' and `non-free' directories are detected it will offer to
use those too; otherwise it will say it doesn't see them anywhere and
will ask the user if they know where to find them.

It will be much easier for the user if the script has the right names.

So, in summary, the script will look for trees named
  stable
  development
  contrib
  non-free
and in each tree will it look for
  binary
 and
  binary/Packages
 or
  binary/Packages.gz

It will look for these trees in the root of the installation
filesystem, or in a subdirectory `debian' of that filesystem.

Ian.